Single-layered arch support insole to be inserted into shoe

ABSTRACT

Provided is an arch support insole to be inserted into a shoe. The insole should satisfy tasks for a wearer as follows: (1) improvement of wearing feeling by maximally reducing the thickness of the insole, (2) reduction of fatigue on walking by maximally preventing transmission of shocks, and (3) sufficient support of the arch of the wearer by maintaining an original shape of the arch support part. In addition, these tasks should be solved by a minimum number of manufacturing processes and minimum cost. The arch support insole includes an insole main body having a portion or the entire of an arch support part curvedly projecting upward to support the arch of a wearer&#39;s foot, and a heel support part coupled to a rear part of the insole main body, wherein the insole main body and the heel support part are formed of a single layer by dual injection, the insole main body is formed of a material having hardness higher than that of the heel support part, and a plurality of honeycomb-shaped projections are formed downward at a bottom surface of the curved arch support part.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of Korean Patent Applications No.10-2007-0125416 and No. 10-2008-0021299 filed with the KoreaIntellectual Property Office on Dec. 5, 2007 and Mar. 7, 2008,respectively, the disclosure of which is incorporated herein byreference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a single-layered arch support insole tobe inserted into a shoe.

2. Description of the Related Art

[Related Prior Art Documents]

1. Korean Utility Model Registration No. 20-0428449 B

2. Korean Utility Model Registration No. 20-0390153 B

3. Korean Utility Model Registration No. 20-0395056 B

4. Korean Patent Laid-open Publication No. 2003-0093618 A

5. Korean Utility Model Registration No. 20-0431315 B

6. U.S. Pat. No. 6,976,322 B

In general, an insole corresponds to the shape of the sole of a foot toform a curved shape such that the insole is bent upward at its outerperiphery to surround the sole of a foot to feel comfort when a userwears shoes. In addition, the sole is formed of a material that canabsorb shock on walking to absorb a portion of shock generated when thefoot contacts the ground, thereby reducing fatigue of the foot andprobability of damage to the foot.

The insole for absorbing shock on walking and increasing softness isformed of thermoplastic rubber (TPR) such as neoprene rubber (NR),styrene butadiene rubber (SBR), butadiene rubber (BR), chloroprenerubber (CR), and so on.

However, since the heel receives shock on walking larger than toes of afoot, when the insole formed of the thermoplastic rubber is worn for along time, the heel of a shoe is damaged such that the heel of the shoeis sunk.

In order to solve the problems, Korean Utility Model Registration No.20-0428449 that describes an insole having different densities at frontand rear parts thereof to prevent the heel of the sole from being sunkand Korean Utility Model Registration No. 20-0390153 that describes aninsole overshoe for correcting a foot including a shock-absorbingcushion formed at the heel thereof have been disclosed. The prior artsdisclose a multi-layered insole further including a shock-absorbingcushion or a foam resin to reduce shock applied to the heel and preventthe heel of the insole from being sunken.

Meanwhile, since pressure distribution in the front and rear parts ofthe insole during walking is uneven, the insole is formed ofpolyurethane to appropriately absorb the entire pressure (see KoreanUtility Model Registration No. 20-0395056). However, since the insoleformed on polyurethane only has insufficient resilience, shock from theground may be periodically applied to the heel by the weight of the usersuch that the entire weight of the user's body is not uniformlydistributed to the front and rear parts of the insole to press themuscles and blood vessels.

While Korean Patent Laid-open Publication No. 2003-0093618 as one of therelated prior art documents discloses a midsole of a shoe, other thanthe arch support insole to be inserted into the shoe, the midsole alsohas a multi-layered structure.

Meanwhile, U.S. Pat. No. 6,976,322 B and Korean Utility ModelRegistration No. 20-0431315 disclose an arch support insole including aplurality of ribs laterally projecting from the arch support insole toprevent deformation of the arch support part due to a load. However,since the ribs disclosed in the above documents are formed in onedirection only, it is difficult to evenly distribute the weight of theuser. In addition, when a user wears the shoes having the insoles for along time, repeated fatigue loads in longitudinal/lateral directions maycause both ends of the ribs to be separated or removed from a bottomsurface of the arch support part.

SUMMARY OF THE INVENTION

The multi-layered structure of insole formed of thermoplastic rubber hasa large thickness of the entire insole to degrade wearing feeling. Inaddition, addition of unnecessary processes upon manufacturing increasesthe number of manufacturing processes and manufacturing cost. Further,the insole formed of a single material having no resilience to supportthe pressure periodically receives shock applied from the ground to theheel to give fatigue on walking for a long time. Furthermore, long-termuse of the insole causes deformation of the arch support part to make itimpossible to sufficiently support the arch of the wearer's foot.

That is, the insole should satisfy tasks for a wearer as follows: (1)improvement of wearing feeling by maximally reducing the thickness ofthe insole, (2) reduction of fatigue on walking by maximally preventingtransmission of shocks, and (3) sufficient support of the arch of thewearer by maintaining an original shape of the arch support part. Inaddition, these tasks should be solved by a minimum number ofmanufacturing processes and minimum cost.

In order to solve the problems, the present invention provides an archsupport insole to be inserted into a shoe including: an insole main bodyhaving an arch support part curvedly projecting upward to support thearch of a wearer's foot, and a heel support part coupled to a rear partof the insole main body, wherein the insole main body and the heelsupport body is formed of a single layer through dual injection. Theinsole main body having the arch support part may be formed of plastichaving hardness higher than that of plastic forming the heel supportpart.

In addition, the arch support insole may further include an anti-slippart coupled to a front part of the insole main body.

Further, the anti-slip part may have the same hardness as the heelsupport part.

Therefore, it is possible to minimally maintain the thickness of a“single-layered” insole to improve wearing feeling and more effectivelyand securely maintain the arch support part. In addition, it is possibleto maintain the arch support part or the anti-slip part softer than thearch support part, wherein the heel support part or the anti-slip partshould require comfort, other than stiffness. Further, since the insoleis manufactured by a dual injection process, it is possible to solveproblems that the number of manufacturing processes and manufacturingcost are increased due to addition of unnecessary processes.Furthermore, it is also possible to increase durability of the insole,in comparison with a process of using adhesive, and so on.

Meanwhile, the present invention also provides an arch support insole tobe inserted into a shoe including: an insole main body having a portionor the entire of an arch support part curvedly projecting upward tosupport the arch of a wearer's foot; and a heel support part coupled toa rear part of the insole main body, wherein the insole main body andthe heel support part are formed of a single layer by dual injection,and a plurality of honeycomb-shaped projections are formed downward at abottom surface of the curved arch support part.

In addition, the insole main body may be formed of a material havinghardness higher than that of the heel support part.

Further, the arch support insole may further include an anti-slip partcoupled to a front part of the insole main body.

Furthermore, the heel support part, the anti-slip part, and thehoneycomb-shaped projections may be integrally formed with each other tosurround the insole main body by dual injection.

In addition, the heel support part, the anti-slip part, and thehoneycomb-shaped projections may be formed of the same material.

Further, the honeycomb-shaped projections and the insole main body maybe formed of the same material.

Therefore, as described above, it is possible to minimally maintain thethickness of a “single-layered” insole to improve wearing feeling andmore effectively and securely maintain the arch support part. Inaddition, it is possible to maintain the arch support part or theanti-slip part softer than the arch support part, wherein the heelsupport part or the anti-slip part should require comfort, other thanstiffness. Further, since the insole is manufactured by a dual injectionprocess, it is possible to solve problems that the number ofmanufacturing processes and manufacturing cost are increased due toaddition of unnecessary processes. Furthermore, it is also possible toincrease durability of the insole, in comparison with a process of usingadhesive, and so on. In particularly, the projections formed at aposition corresponding to the bottom surface of the arch support partcurvedly projecting upward to support the arch of the wearer's footemploys a honeycomb structure, i.e., a hexagonal structure, toeffectively prevent the arch support part from being buckled, by ideallyand evenly distributing the weight of the wearer, even though repeatedfatigue loads are generated due to the long-term use.

Meanwhile, the present invention also provides an arch support insoleincluding: an insole main body having an arch support part curvedlyprojecting upward to support the arch of a wearer; and a heel supportpart configured to support the heel of the wearer's foot, wherein aplurality of honeycomb-shaped projections project downward from aposition only corresponding to a bottom surface of the curved archsupport part.

In addition, the present invention also provides an arch support insoleincluding: an arch support part curvedly projecting upward to supportthe arch of a wearer's foot; and a peripheral part coupled to the archsupport part as a single layer to surround the arch support part by dualinjection, wherein the arch support part is formed of a material havinghardness higher than that of the peripheral part, and a plurality ofhoneycomb-shaped projections project downward from a positioncorresponding to a bottom surface of the curved arch support part.Preferably, the honeycomb-shaped projections and the arch support part,or the honeycomb-shaped projections and the peripheral part may beformed of the same material.

That is, as described above, the projections formed at a positioncorresponding to the bottom surface of the arch support part curvedlyprojecting upward to support the arch of the wearer's foot employs ahoneycomb structure, i.e., a hexagonal structure, to effectively preventthe arch support part from being buckled or deformed, by ideally andevenly distributing the weight of the wearer, even though repeatedfatigue loads are generated due to the long-term use. In addition,according to use purposes, the insole may be formed by dual injectionsuch that a minimal part corresponding to the arch support part isformed of a material having high hardness, and the other part is formedof a relatively soft material. As a result, it is possible to feelcomfort and minimize fatigue on walking, in addition to the arch supportand buckling prevention purposes.

Further, the plurality of honeycomb-shaped projections may have the sizethat is gradually reduced from the front part to the rear part of theinsole main body to effectively prevent deformation and buckling of therear part of the arch support part due to general load concentration tothe rear part of the insole by the weight of the wearer.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects and advantages of the present generalinventive concept will become apparent and more readily appreciated fromthe following description of the embodiments, taken in conjunction withthe accompanying drawings of which:

FIG. 1 is a perspective view of an insole in accordance with a firstembodiment of the present invention;

FIG. 2 is a plan view of the in accordance with the first embodiment ofthe present invention;

FIG. 3 is a perspective view of an insole in accordance with a secondembodiment of the present invention;

FIG. 4 is a plan view of the insole in accordance with the secondembodiment of the present invention;

FIG. 5 is a perspective view of an insole in accordance with a thirdembodiment of the present invention;

FIG. 6 is a plan view of the insole in accordance with the thirdembodiment of the present invention;

FIG. 7 is a bottom view of the insole in accordance with the thirdembodiment of the present invention; and

FIG. 8 is a side view of the insole in accordance with the thirdembodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, exemplary embodiments of the present invention will bedescribed with reference to the accompanying drawings.

First Embodiment

FIG. 1 is a perspective view of an insole in accordance with the firstembodiment of the present invention, and FIG. 2 is a plan view of the inaccordance with the first embodiment of the present invention.

The insole 10 in accordance with the first embodiment of the presentinvention includes an insole main body 11 corresponding to the shape ofsole of a foot, except toes, and a heel support part 12 surrounding theheel of the foot. The insole main body 11 and the heel support part 12is formed of a single layer and fabricated by plastic materials havingdifferent hardness.

In general, the insole formed of a plastic material such aspolypropylene or nylon is manufactured by a plastic molding technology.In general, plastic molding methods are classified into various methodssuch as injection molding, press molding, transfer molding, rotarymolding, thermal molding, blow molding, film blowing, extrusion,calendaring, fiber spinning, and so on. Among them, the injectionmolding, pressing molding, transfer molding, and rotary molding aremethods of pushing a plastic material into a cavity formed between twoclosed molds to form molding products.

The insole 10 in accordance with the present invention may bemanufactured by dual injection. The dual injection uses two kinds ofresin or two colors of resin. A mold is configured to perform dualinjection using two injection apparatuses and an injector having arotary mechanism installed on a movable plate or a core or a slidestructure. A primary mold product is initially formed by the mold, andsecondary resin is filled between the primary mold product and asecondary cavity to form a final mold product. Since the primary andsecondary cavities are precisely exchanged, the dual injection is widelyused for design variation in various applications without shaperestriction.

The dual injection can produce various designs of products through asingle molding process at low cost, in comparison with the conventionalinjection in which injection is performed two times to form two partsand then the two parts are melted to each other and processed by asecondary process such as a painting process.

The injection molding is classified into an insert method in which twooperators use two injectors to inject products through two molds, or atwo-color method in which one operator use a single injector to injectproducts through two linkage molds. In some embodiments of the presentinvention, a two-color dual injection molding may be used to reducecosts including molding cost, personal expenses, operation costs of theinjector, and so on. In addition, it is possible to improve productivitythrough simultaneous injection and simultaneously inject two kinds ofplastics having different hardness.

The insole 10 in accordance with the first embodiment of the presentinvention includes the insole main body 11 and the heel support part 12formed of a single layer using the two-color method among the dualinjection. A first plastic material is injected into a first cavity toprimarily form the insole main body 11. Then, a second plastic materialis filled into a second cavity to form the heel support part 12 tothereby form the insole main body 11 and the heel support part 12 as asingle layer.

More specifically, first, the first plastic material is inserted intothe first cavity to primarily form the insole main body 11. The firstplastic material is mixture of polybutylene terephthalate (PBT) andpolyethylene terephthalate (PET).

Then, the second plastic material is filled into the second cavity toform the heel support part 12 to thereby form the insole main body 11and the heel support part 12 as a single layer. The second plasticmaterial is a synthetic material of nylon and glass fiber.

Hardness of the manufactured insole 10 is measured using arubber/plastic durometer used to measure hardness of hard rubber, hardplastic, ebonite, and so on. When the rubber/plastic durometer uses arubber/plastic durometer of ASKER Co., the hardness of the insole mainbody 11 is D type 90, and the hardness of the heel support part 12 is Dtype 70.

As a result, it is possible to minimally maintain the thickness of a“single-layered” insole to improve wearing feeling and more effectivelyand securely maintain the arch support part. In addition, it is possibleto maintain the arch support part or the anti-slip part softer than thearch support part, wherein the heel support part or the anti-slip partshould require comfort, other than stiffness. Further, since the insoleis manufactured by a dual injection process, it is possible to solveproblems that the number of manufacturing processes and manufacturingcost are increased due to addition of unnecessary processes.Furthermore, it is also possible to increase durability of the insole,in comparison with a process of using adhesive, and so on.

Second Embodiment

FIG. 3 is a perspective view of an insole in accordance with the secondembodiment of the present invention, and FIG. 4 is a plan view of theinsole in accordance with the second embodiment of the presentinvention.

The insole 20 in accordance with the second embodiment of the presentinvention further includes an anti-slip part 13 to prevent slippage of afront part of the insole 20. The heel support part 12 and the anti-slippart 13 has hardness different from the insole main body 11 such thatthe heel support part 12 smoothly wraps the heel and the anti-slip part13 minimize movement of the insole 20 when the insole 20 is insertedinto a shoe. The second embodiment is similar to the first embodiment,except the above description, and thus, overlapping description thereofwill not be repeated.

In a manufacturing method thereof, similar to the first embodiment, afirst plastic material is inserted into a first cavity to primarily formthe insole main body 11, and then, a second plastic material is filledinto a second cavity to form the heel support part 12 and the anti-slippart 13, thereby forming the insole main body 11, the heel support part12, and the anti-slip part 13 as a single layer.

Here, it is more preferable for machining of the insole that theanti-slip part 13 has the same hardness as the heel support part 12, butnot limited thereto.

Third Embodiment

FIG. 5 is a perspective view of an insole in accordance with the thirdembodiment of the present invention, FIG. 6 is a plan view of the insolein accordance with the third embodiment of the present invention, FIG. 7is a bottom view of the insole in accordance with the third embodimentof the present invention, and FIG. 8 is a side view of the insole inaccordance with the third embodiment of the present invention.Meanwhile, in this embodiment, description overlapping theaforementioned embodiments will not be repeated.

The insole 30 in accordance with the third embodiment of the presentinvention, which is characterized by an arch support part different fromthe first and second embodiments, generally includes an insole main body11 configured to include a portion or the entire of an arch support partcurvedly projecting upward to support the arch of a wearer's foot, and aheel support part 12 coupled to a rear part of the insole main body. Theinsole main body 11 and the heel support part 12 is formed of a “singlelayer” by dual injection, and the insole main body 11 is formed of amaterial having hardness higher than that of the heel support part 12.

In particular, a plurality of honeycomb-shaped projections 15 projectdownward from a position corresponding to a bottom surface of the curvedarch support part 11 a.

The honeycomb-shaped projections 15 is formed at only the bottom surfaceof the curved arch support part 11 a, and has a hexagonal shape.

Here, while the number and size of the honeycomb structures is notlimited, it is preferable that the size of the honeycomb structures isgradually reduced from the front part to the rear part of the insolemain body, as shown in FIGS. 5 to 8. That is, with reference to an apexof the arch support part, the size of the honeycomb is increased towardthe front part corresponding to the toe part, and the size of thehoneycomb is reduced toward the rear part corresponding to the heelpart. Since the weight of the wearer is generally concentrated to therear part of the insole, it is possible for the insole in accordancewith the present invention to more effectively prevent deformation andbuckling of the rear part of the arch support part against theconcentrated load.

The projected hexagonal structures have the same thickness, and theheight of the hexagonal structures is tapered toward the insole partexcept the outer part of the insole and the arch support part.

That is, it is difficult to evenly distribute the weight of the wearerusing the conventional rib structure, and long-term wearing of thewearer applies repeated longitudinal/lateral fatigue loads to both endsof the ribs to separate or remove the both ends from the bottom surfaceof the arch support part. In order to solve the problems, theprojections formed at a position corresponding to the bottom surface ofthe arch support part employ a “honeycomb” structure, i.e., a hexagonalstructure.

Therefore, in addition to effects of the aforementioned embodiment, inparticular, the projections formed at a position corresponding to thebottom surface of the arch support part curvedly projecting upward tosupport the arch of the wearer's foot employ a “honeycomb” structure,i.e., a hexagonal structure, such that the weight of the wearer can beideally and uniformly distributed to effectively prevent the archsupport part from being buckled even though repeated fatigues aregenerated due to long-term use.

Meanwhile, the arch support insole of the embodiment may further includean anti-slip part 13 coupled to a front part of the insole main body. Inorder to improve coupling power of the insole main body 11 to the otherinsole parts 12 and 13, it is more preferable that the heel support part12, the anti-slip part 12, and the honeycomb-shaped projections 15 areconfigured to be integrally formed with each other (see the connectionpart designated by reference numeral 14) to surround the insole mainbody 11 through dual injection. Of course, when the anti-slip part 13 isomitted, the heel support part 12 and the honeycomb-shaped projections15, except the anti-slip part, may be integrally connected to each otherto surround the insole main body 11 through dual injection.

In addition, in the arch support insole of the embodiment, inconsideration of forming of the insole, the heel support part 12, theanti-slip part 13 and the honeycomb-shaped projections 15 may be formedof the same material. In consideration of prevention of deformation ofthe arch support part 11 a, the honeycomb-shaped projections 15 and theinsole main body 11 may be formed of the same material.

Fourth Embodiment

The fourth embodiment has basically the same basic concept as theaforementioned embodiments, this embodiment relates to an arch supportinsole capable of increasing comfort of shoes according to requirementsof a wearer. That is, different from the third embodiment, the insole isdual injected such that only the arch support part 11 a is formed of arelatively hard material and the other part except the arch support partis formed of a relatively soft material to improve cushion thereof.

Therefore, the arch support insole of the embodiment includes an archsupport part 11 a curvedly projecting upward to support the arch of awearer's foot, and a peripheral part coupled to the arch support part asa single layer to surround the arch support part 11 a through dualinjection, wherein the arch support part 11 a is formed of a materialhaving hardness higher than that of the peripheral part, and a pluralityof honeycomb-shaped projections 15 project downward from only a positioncorresponding to a bottom surface of the curved arch support part.

Here, the peripheral part corresponds to all the other parts of theinsole, except the arch support part (i.e., the insole main body of theaforementioned embodiment corresponds to the arch support part itself).The plurality of honeycomb-shaped projections 15 and the arch supportpart 11 a may be formed of the same material, or the plurality ofhoneycomb-shaped projections 15 and the peripheral part may be formed ofthe same material.

As described above, according to use purposes, the insole may be formedby dual injection such that a minimal part corresponding to the archsupport part is formed of a material having high hardness, and the otherpart is formed of a relatively soft material. As a result, it ispossible to feel comfort and minimize fatigue on walking, in addition tothe arch support and buckling prevention purposes.

Fifth Embodiment

An arch support insole of the embodiment is especially appropriate toorthopedic treatment, which is different from the aforementionedembodiments formed of a single layer formed of two different materialsthrough dual injection in that the insole is formed of a single layerformed of a single material having relatively high hardness.

For this purpose, an arch support insole in accordance with anotherembodiment of the present invention includes an insole main body 11configured to include an arch support part 11 a curvedly projectingupward to support the arch of a wearer's foot, and a heel support part12 configured to support the heel of the wearer's foot, wherein aplurality of honeycomb-shaped projections 15 project from a positioncorresponding to a bottom surface of the curved arch support part.

Namely, the present embodiment is concentrated to correction ortreatment of the arch of a patient, rather than wearing comfort orfatigue. Other effects and descriptions overlapping the abovedescriptions will not be repeated.

While this invention has been described with reference to exemplaryembodiments thereof, it will be clear to those of ordinary skill in theart to which the invention pertains that various modifications may bemade to the described embodiments without departing from the spirit andscope of the invention as defined in the appended claims and theirequivalents.

1. An arch support insole to be inserted into a shoe comprising: aninsole main body including an arch support part curvedly projectingupward to support an arch part of a wearer's foot; and a heel supportpart coupled to a rear part of the insole main body, wherein the insolemain body and the heel support body are formed of a single layer throughdual injection.
 2. The arch support insole according to claim 1, whereinthe insole main body including the arch support part is formed ofplastic with hardness higher than that of plastic forming the heelsupport part.
 3. The arch support insole according to claim 2, furthercomprising an anti-slip part coupled to a front part of the insole mainbody.
 4. The arch support insole according to claim 3, wherein theanti-slip part has the same hardness as the heel support part.
 5. Anarch support insole to be inserted into a shoe comprising: an insolemain body including at least a portion of an arch support part curvedlyprojecting upward to support the arch of a wearer's foot; and a heelsupport part coupled to a rear part of the insole main body, wherein theinsole main body and the heel support part are formed of a single layerby dual injection, and a plurality of honeycomb-shaped projections areformed downward at a bottom surface of the curved arch support part. 6.The arch support insole according to claim 5, wherein the insole mainbody is formed of a material having hardness higher than that of theheel support part.
 7. The arch support insole according to claim 5,further comprising an anti-slip part coupled to a front part of theinsole main body.
 8. The arch support insole according to claim 7,wherein the heel support part, the anti-slip part, and thehoneycomb-shaped projections are integrally formed with each other tosurround the insole main body by dual injection.
 9. The arch supportinsole according to claim 8, wherein the heel support part, theanti-slip part, and the honeycomb-shaped projections are formed of thesame material.
 10. The arch support insole according to claim 5, whereinthe honeycomb-shaped projections and the insole main body are formed ofthe same material.
 11. An arch support insole to be inserted into a shoecomprising: an insole main body including an arch support part curvedlyprojecting upward to support the arch of a wearer; and a heel supportpart configured to support the heel of the wearer's foot, wherein aplurality of honeycomb-shaped projections projecting downward from aposition only corresponding to a bottom surface of the curved archsupport part.
 12. The arch support insole according to claim 11, whereinthe plurality of honeycomb-shaped projections have the size that isgradually reduced from the front part to the rear part of the insolemain body.
 13. An arch support insole to be inserted into a shoecomprising: an arch support part curvedly projecting upward to supportthe arch of a wearer's foot; and a peripheral part coupled to the archsupport part as a single layer to surround the arch support part by dualinjection, wherein a plurality of honeycomb-shaped projections projectdownward from a position corresponding to a bottom surface of the curvedarch support part.
 14. The arch support insole according to claim 13,wherein the arch support part is formed of a material having hardnesshigher than that of the peripheral part.
 15. The arch support insoleaccording to claim 13, wherein the honeycomb-shaped projections and thearch support part are formed of the same material.
 16. The arch supportinsole according to claim 13, wherein the honeycomb-shaped projectionsand the peripheral part are formed of the same material.
 17. The archsupport insole according to claim 1, wherein the dual injection is atwo-color forming method.
 18. The arch support insole according to claim5, wherein the dual injection is a two-color forming method.
 19. Thearch support insole according to claim 5, wherein the plurality ofhoneycomb-shaped projections have the size that is gradually reducedfrom the front part to the rear part of the insole main body.
 20. Thearch support insole according to claim 13, wherein the plurality ofhoneycomb-shaped projections have the size that is gradually reducedfrom the front part to the rear part of the insole main body.